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Long-term Debt - Terms and Covenants (Details) | 6 Months Ended
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Jun. 30, 2018
Line of Credit Facility [Line Items] |
Line of Credit Facility, Covenant Terms | The Company's credit facilities contain financial covenants and undertakings requiring the Company to maintain various financial ratios, including: - a minimum percentage of aggregate vessel value to secured loans (the security cover ratio or "SCR"); - a maximum ratio of total liabilities to market value adjusted total assets; - a minimum EBITDA to interest coverage ratio; - a minimum liquidity; and - a minimum market value adjusted net worth
Debt Instrument, Covenant Compliance | As of December 31, 2017 and June 30, 2018, the Company was in compliance with the applicable financial and other covenants contained in its debt agreements, including the Company's senior unsecured notes due 2022 (the "2022 Notes").
Line of Credit Facility, Dividend Restrictions | Under all loan agreements, the Company is not allowed to pay dividends until all Deferred Amounts have been repaid in full. Additionally, the Company may not pay dividends or distributions if an event of default has occurred and is continuing or would result from such dividend or distribution. As of December 31, 2017 and June 30, 2018, the Company was in compliance with the applicable financial and other covenants contained in its debt agreements, including the Company's senior unsecured notes due 2022 (the "2022 Notes").

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- Definition States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the conditions for borrowing under the credit facility including the nature of any restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of restrictions on the entity's ability to pay dividends as required by the terms of the credit facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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